Belting



(No Model.)

T. W. EMERY.

BBLTING.

eb..4,r1890.

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UNrrnD STATES 4VPATENT OFFICE.

THOMAS WVM. EMERY, OF MINNEAPOLIS, MINNESOTA.

BELTING.

SPECIFICATION forming part of Letters Patent No. 420,779, dated February4, 1890.

Application filed June l5, 1889. Serial No. 314,426. (No model.)

To @ZZ whom. it may concern.-

Be it known that I, THOMAS I/VILLI'AM EMERY, of Minneapolis, in thecounty of Hennepin and State of Minnesota, have invented certain new anduseful Improvements in lnelastic Belting, of which the following is aspecification.

My invention relates to belts used in the driving of machinery', whethercomposed of leather, rubber, cloth, or other flexible material; and itsobject is to so construct said belts that While preserving theirexibility they are rendered absolutely non-elastic, and the ends of thebelt may be joined without riveting or tying' in the ordinary manner;and it consists, generally, in the construction and combinationhereinafter described, and particularly pointed out in the claims.

In the accompanying' drawings, forming a part of this specification,Figure 1 is an elevation Aof a portion of my improved belting, showingthe construction/and manner of uniting the ends. Fig. 2 isalongit-udinal section of the same on line w a: of Fig. 1; Fig. 3, across-section of same on line y y of Fig. l. Figs. 4 and 5 are detailsshowing strips provided with projections. Figs. 6 and 7 show modifiedform of lock.

In the drawings, 2 represents the two layers of an ordinary leatherbelt; 3 3, the metallic strips arranged parallel with each other andlongitudinal of the belt and cemented between the layers 2 a. Thesestrips are preferably of steel, which is superior from its flexibilityand because it cannot be stretched any appreciable amount by severe longitudinal strain. These strips may be formed as smooth flat ribbons orindented so as to form slight projections 5 5 on the opposite side,which become embedded in the material surrounding them and hold thestrips iirmly in place, so as to prevent slipping between the layersofthe belting or lateral movement so as to wear the belting material. WhenWoven in to cloth belting, the strips serve to form in part the warp ofthe belting, and the belting' can afterward be dressed with oil or otherwaterproong composition, which renders it impervious to water, and alsoassists in holding the strips firmly in position.

In uniting the ends of the belt the ends of the layers are preferablyturned back and the opposite ends of the strips overlapped a sufficientdistance, and then locked together so as to form a strong union when theloose ends of the layers of the belts are cemented together, thus firmlyinclosing between them the united ends of the strips. By this meansthere are no projecting rivets or thongs and the belt has a smoothunion, while being absolutely inelastic for all practical purposes, andlight belts may be constructed of vastly greater tensile strength thanif made without the metallic strips and suitable to be used in positionsexposed to the weather where ordinary belting cannot be used, since theinetallic strips are unaffected by moisture.

Belts may be formed with any desired number of metallic strips, theedges of the belt being preferably cemented together outside of thestrips, so that they are firmly inclosed and held in place.

In uniting two belts together edge to edge the union is much improvedand strengthened by inclosing a metallic strip between the' joinededges, the strip extending into the body of each belt, and thevbelt-layers being cemented or riveted to the metallic strip.

I prefer the form of lock shown in the drawings, in which the strips areprovided with series of vertical notches or slots 7 7, extendingone-half of the Width of the strip, the slots at opposite ends being onopposite sides or alternately on both sides, whereby the strips can bedoubly locked so as to engage each other. By this means the strips canreadily belocked and again unlocked if it is necessary to take up anyslight stretch of the belt or crawl of the belt-layers. The metallicstrips being flat do not strain or injure the fabric of woven belting,as is the case when wire is used, and being plan e-surfaced, or freefrom transverse corru gations they cannot be stretched,whereas if theyhad curves or transverse oorrugations the belt would yield or stretchlengthwise in proportion to the corrugations employed. This stretchingis what I seek to avoid, While at the same time preserving theflexibility of the belt and imparting strength thereto.

I claimA 1. The belting composed of the metallic ribbons having theiradjacent ends slitted, lapped, and locked together, and the covering forthe ribbons made to lie on opposite sides IOO of the lapped ends of theribbons, so es to instantially es described, for seid ribbons, subelosethe same, substantially as and for the stantiaily as and for thepurposes set forth. Io

purposes set forth. In testimony whereof I have hereunto set 2. Thebelting composed of the inetfillie my hand this 10th day of June, 188).5 ribbons having transverse slits in the edges, THOMAS WVM. EMERY.

with the ends of the strips joined together by In presence of-w Iappingand having one edge inserted in the T. D. MERWIN,

slit-s of the adjacent edge, and a covering, sub- A. C. PAUL.

